Because the Constitution makes it so difficult to add an amendment to it, and because there is such a deep disagreement about the role that money is to play in American politics, the chances that an anti-Citizens United amendment will gain enough support to pass remain slim, at best.

In 1921, when Benjamin Cardozo was a justice on New York’s highest state court (about a decade before he would become a Supreme Court Justice), he cautioned in a famous lecture series that logic could become too strong a driving force as judges decided cases.